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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Fauna of the Cocos (Keeling) Islands ： ウィキペディア英語版 Fauna of the Cocos (Keeling) Islands The terrestrial fauna of the Cocos (Keeling) Islands is unsurprisingly depauperate, because of the small land area of the islands, their lack of diverse habitats, and their isolation from large land-masses. However, the fauna dependent on marine resources is much richer. ==Birds== As a small and isolated group of islands in two atolls 24 km apart in the eastern Indian Ocean, the number of species of resident landbirds (as opposed to seabirds and waders) is very small. These comprise the endemic subspecies of buff-banded rail, the introduced green junglefowl and helmeted guineafowl, the white-breasted waterhen, eastern reef egret, nankeen night heron and the introduced Christmas white-eye. Four other introduced species are now extinct in the Islands. Several other landbird species have been recorded occasionally, but none has established a breeding population. Migratory waders recorded in the islands include some regular visitors as well as vagrants. None breeds there. However, North Keeling is important for breeding seabirds, with sizeable numbers of red-footed boobies, great and lesser frigatebirds, common noddies and white terns. Other breeding seabirds include wedge-tailed shearwaters, masked boobies, brown boobies, red-tailed and white-tailed tropicbirds, and sooty terns. It is possible that the herald petrel breeds there as well. Presumably, before human occupation of the islands in the 19th century, seabirds bred on both atolls. However, with the establishment of a human population and the introduction of rodents to the southern atoll, significant seabird colonies are now restricted to the northern atoll of North Keeling. Although the Cocos islanders used to visit North Keeling regularly to harvest seabirds, this practice largely ceased with the establishment of Pulu Keeling National Park in 1995. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Fauna of the Cocos (Keeling) Islands」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.